108 results about "Aprepitant" patented technology

An aqueous stable and ready-to-use formulation of aprepitant is prepared. Especially preferred formulations comprise a synergistic combination of a co-solvent and a surfactant and may further include a secondary co-solvent. Among other advantages of contemplated formulations, aprepitant is dissolved at high concentrations and remains dissolved and stable, even over prolonged periods of time.

Disclosed herein are novel pharmaceutical formulations of aprepitant suitable for parenteral administration including intravenous administration. Also included are formulations including both aprepitant and dexamethasone sodium phosphate. The pharmaceutical formulations are stable oil-in-water emulsions for non-oral treatment of emesis and are particularly useful for treatment of subjects undergoing highly emetogenic cancer chemotherapy.

The present invention relates to a controlled release sterile injectable formulation in the form of solution, suspension or sol-gel formulation for intramuscular or subcutaneous administration comprising a therapeutically effective amount of a neurokinin 1 receptor antagonist, in particular Aprepitant or Fosaprepitant or pharmaceutical acceptable salt, derivative or metabolite thereof. It also relates to a process for developing such formulations.

The invention relates to a loaded aprepitant nanocrystal lipid microcapsule and a preparation method thereof, and belongs to the technical field of a medicine. The microcapsule is prepared by the method comprising the following steps: preparing an aprepitant nanocrystal from aprepitant by virtue of a grinding process, high-speed air jet pulverization or high-pressure homogenization, then mixing and emulsifying the aprepitant nanocrystal with phospholipid, removing a liquid phase and drying so as to obtain the aprepitant nanocrystal lipid microcapsule. The prepared loaded aprepitant nanocrystal lipid microcapsule can improve the stability of the aprepitant nanocrystal and the lipid loaded nanocrystal can increase the speed and the amount of being absorbed by gastrointestinal mucosa of a body, so that the effects of relatively high bioavailability and accelerated development of efficacy are achieved; and the preparation method of the loaded aprepitant nanocrystal lipid microcapsule is mild in condition, simple and controllable, low in preparation cost and is suitable for large-scale production.

A process for preparing aprepitant.

The invention provides an aprepitant compound. The compound comprises 30-70wt% of aprepitant, 20-60wt% of monosaccharide and 10-50wt% of a suspending agent. The monosaccharide in the compound is helpful for forming aprepitant nanocrystals; and the suspending agent can avoid local non-uniformity caused by wet grinding and settlement of a suspension in the spray drying process. The prepared aprepitant compound greatly improves the solubility of aprepitant, is helpful for improving the bioavailability of aprepitant, and has great clinical application values. The method of the invention is simple, and is suitable for industrial production.

The invention belongs to the technical field of medicines, and discloses an aprepitant nanosuspension and a preparation method thereof. As aprepitant is small in solubility in water and lower in the oral bioavailability, popularization and use of aprepitant are limited. The aprepitant nanosuspension provided by the invention is characterized by comprising aprepitant, copovidone PVPS630 and povidone PVPK-90 by mass ratio of (4-10):(1-2):(1-2). The preparation method of the aprepitant nanosuspension is mild in condition and simple and controllable, and higher oral bioavailability of aprepitant is realized.

The invention discloses an aprepitant nano composition which is composed of aprepitant, an oil phase, an emulsifier, a co-emulsifier, a stabilizer, an auxiliary stabilizer and an optional solid adsorbent. The aprepitant nano composition significantly improves solubility, stability and bioavailability of the aprepitant.

The invention provides a refining and purifying method of aprepitant key intermediate (I); a product (I)-containing reaction liquid is obtained by Grignard addition reaction of a compound (II), the product (I)-containing reaction liquid is added into a mixture of an inorganic acid water solution and an organic solvent insoluble in water, after standing and layering, organic phase is washed successively with water and saturated salt water, and a white solid product is obtained by vacuum concentration to dry at a certain temperature. The refining method has low requirement to equipment, is in no need of control of the temperature in the quenching process, and is afe and convenient in operation, and the obtained intermediates (I) can be used for the preparation of aprepitant with higher purity, and is suitable for industrialized production.

The invention discloses a method for synthesizing an aprepitant intermediate (2R, 3S)-2-[(1R)-1-[3,5-bis(trifluoromethyl)phenyl]ethyoxyl]-3-(4-fluorophenyl)-morpholine hydrochloride I. The method comprises the following steps: performing a condensation reaction on the raw materials 4-benzyl-2-hydroxy-morpholine-3-one II and (R)-1-[3,5-bi(trifluoromethyl)phenyl]ethanol III in the presence of a catalyst to obtain a compound IV, adding a Grignard reagent to the obtained compound IV for having a Grignard reaction and converting the compound IV into a compound V under a reduction condition, and performing a hydrochlorination reaction on the obtained compound V to obtain the target compound I. The method is simple in preparation flow and suitable for industrial production, and has the advantages of high total recovery, convenient intermediate purification, high target product purity and the like.

The present invention is directed to nanostructured Aprepitant compositions, process for the preparation thereof and pharmaceutical compositions containing them. The nanoparticles of Aprepitant according to the invention have an average particle size of less than about 200 nm. The stable nanostructured particles of the invention are presented by increased solubility, dissolution rate, permeability and bioequivalent or enhanced biological performance characterized by significantly decreased fed/fasted effect compared to the reference and marketed drug. Aprepitant is a chemical compound that belongs to a class of drugs called substance P antagonists (SPA). It mediates its effect by acting on neurokinin 1 receptor. Aprepitant is manufactured by Merck & Co. under the brand name Emend for prevention of acute and delayed chemotherapy-induced nausea and vomiting (CINV) and for prevention of postoperative nausea and vomiting.

A liquid pharmaceutical compositions comprising Aprepitant is preferably prepared as an oral suspension dosage form for the prevention and control of acute and delayed chemotherapy induced nausea and vomiting, and/or for prevention of postoperative nausea and vomiting.

The invention discloses an aprepitant oral pharmaceutical preparation. The aprepitant oral pharmaceutical preparation comprises 15wt%-25wt% of aprepitant, 45wt%-75wt% of hydroxypropyl methylcellulose phthalate/hydroxypropyl methylcellulose acetate succinate, 10wt%-25wt% of microcrystalline cellulose, lactose or mannitol, 2wt%-8wt% of low-substituted hydroxypropyl cellulose as well as croscarmellose sodium and/or crospovidone, 0-2wt% of silicon dioxide and/or talc and 0-2wt% of magnesium stearate. The pharmaceutical preparation can be prepared in a form of tablets or capsules andhas high stability and good bioavailability.

The invention discloses an aprepitant emulsion formulationpreparation. The emulsion formulationpreparation is prepared from the following components in percentage by mass: 0.05-1.5% of aprepitant, 2-20% of soybean oil, 5-20% of egg yolk lecithin, 0.5-5% of ethanol, 0.05-2% of sodium oleate, 2-10% of sucrose, and 40-80% of injection water.According to the embodiment of the invention, sodium oleateis added into oil phase, sticky materials are not easily produced during mixing, the time of forming a colostrum formulationpreparation is shorter, and the preparation efficiency is high, and meanwhile, the emulsion formulation prepared during the preparation process provided by the invention is more stable and has a better treatment effect.

The invention relates to aprepitant intravenous injection emulsion as well as a preparation method and an application thereof, and belongs to the technical field of pharmaceutics. The aprepitant intravenous injection emulsion is prepared from components in percentage by mass as follows: 0.05%-3% of aprepitant, 5%-30% of an oil phase solvent, 1.2%-18% of an emulsifier, 0.03%-0.6% of a stabilizer and 1%-5% of an isoosmotic adjusting agent, the injection emulsion further contains a pH regulating agent and the balance of water for injection, and pH value of the injection emulsion is 5.5-8.0. The aprepitant intravenous injection emulsion contains no low-carbon chain alcohol such as ethanol and the like, meanwhile, the quality requirement for a marketed product can be met by technological innovation and adjustment, and clinical use safety of the aprepitant intravenous injection emulsion is greatly improved; direct intravenous injection is utilized during clinical using, and dilution is not needed; the aprepitant intravenous injection emulsion can be used for treating acute and tardive nausea and vomiting caused by high-dose cis-platinum combined high-dose sensitizing cancer chemotherapy,and nausea and vomiting in early stage and middle stage of tumor chemotherapy are reduced.

The invention discloses a preparation process of aprepitant. The process comprises the steps as follows: Step 1, a compound A and a compound B are firstly added to a mixed solvent of N,N-dimethylformamide and triethylamine to be stirred and dissolved to obtain a mixed solution; Step2, adding lithium diisopropylamide to the mixed solution in a nitrogen atmosphere and performing uniform mixing; Step3, dropwise adding a diethyl sulfate xylene solution under conditions of nitrogen shielding and stirring; Step 4, after addition, conducting a stirring reaction at 30-35 DEG C for 12-15 h under shielding of nitrogen; Step 5, separating and purifying a reaction product in Step 4 to obtain a final aprepitant product. By process improvement and formula optimization, the aprepitant synthesis processhas the characteristics of mild reaction condition, low cost and the like and is suitable for large-scale industrial production; the synthesized aprepitant product has low impurity content and high purity, and the yield of aprepitant is greatly increased.

The invention discloses a novel preparation method for an aprepitant capsule. The novel preparation method comprises the following steps: preparation of a hydroxy propyl cellulose solution, addition of the main drug aprepitant, grinding of a medium, preparation of a coating dispersion, bottom spraying of a coating, overall mixing and filling of a capsule. With the preparation method, the capsule is filled with aprepitant; the prepared aprepitant capsule has good stability, high purity and improved quality; and the preparation method is low in cost for raw materials and equipment and beneficial for large-scale production.

A coprecipitate comprising amorphous aprepitant and a pharmaceutically acceptable carrier is prepared by rapidly removing solvent from a solution containing aprepitant and the carrier.

The invention discloses an aprepitant intermediate detection method. An aprepitant intermediate is (2R)-4-benzyl-2-[(1R)-1-[3,5,bis(trifluoromethyl)phenyl]ethoxy]morpholine-3-ketone. The detection method comprises the steps that detection is conducted through a high performance liquid chromatograph, and quantitative analysis is conducted through an area normalization method; the chromatographic conditions are that a chromatographic column is chiralcel OD-H, the sample size ranges from 15 microliters to 25 microliters, the flow velocity ranges from 0.7 ml/min to 0.9 ml/min, the column temperature ranges from 10 DEG C to 40 DEG C, the detection wavelength ranges from 212 nm to 218 nm, the mobile phase is prepared from n-hexane and isopropanol, the volume ratio of n-hexane to isopropanol is (40-60):50, and a detector is an ultraviolet detector. By means of the detection method, rapid and accurate determination on (2R)-4-benzyl-2-[(1R)-1-[3,5,bis(trifluoromethyl)phenyl]ethoxy]morpholine-3-ketone can be achieved, the sensitivity is very high, operation is easy, complete separation can be achieved, and the basis of research and development and quality detection can be provided for researching the compound.

The invention provides a preparation method of a high stability aprepitant composition. The preparation method comprises the following steps: grinding aprepitant and an auxiliary material between -170DEG C and -100 DEG C for 0.5-3h, and then performing granulating. The preparation method can improve solubility of an insoluble medicine, namely aprepitant, and increase dissolving-out speed of a preparation. Compared with the existing aprepitant capsule, the prepared aprepitant capsule can ensure physical stability of active ingredients, and a preparation technology of the preparation is simple,appropriate in cost and applicable to industrial mass production.

The invention belongs to the technical field of chemistry, and in particular relates to a chiral synthesis method of (R)-1-(3, 5-di (trifluoromethyl) phenyl] ethanol, and the prepared compound is a key intermediate for the production of aprepitant. The technical scheme includes two reaction steps, namely a) biological catalytic reduction of formula I by use of bread yeast, and b) configuration reversion of byproduct formula III prepared by the step a) to obtain formula II, and the technical scheme can also include the preparation of immobilized yeast cells, namely bread yeast immobilization. The method is biological asymmetric reduction, has the advantages of low cost, simple operation, high yield, mild reaction conditions, great implementation value, and suitability for industrial production.

The invention provides a new neurokinin (NK-1) receptor antagonist aprepitant crystal form V. The new aprepitant crystal form V powder has characteristic X diffraction ray peaks at the wavelengths of 12.08 degrees +/-0.2, 15.31 degrees +/-0.2, 17.61 degrees +/-0.2, 20.62 degrees +/-0.2 and 24.76 degrees +/-0.2 2 theta in an X-ray diffraction pattern. The invention also provides a preparation method of the aprepitant new crystal form V.

The invention belongs to the technical field of medicines, and specifically relates to aprepitant capsules. The aprepitant capsules contain aprepitant, hydroxy propyl cellulose, diethylene glycol monoethyl ether, fumed silica and other pharmaceutically acceptable filler, disintegrant and lubricant. A preparation method of the aprepitant capsules comprises the following steps: dissolving aprepitant in diethylene glycol monoethyl ether, adding hydroxy propyl cellulose, stirring to dissolve, adding fumed silica to adsorb, then uniformly mixing with the other pharmaceutically acceptable filler, disintegrant and lubricant, and directly filling capsules. Compared with the prior art, the aprepitant capsules disclosed by the invention are fast in medicine dissolution speed, simple in process, and free from a surfactant and a micronization treatment. An acceleration test result indicates that the prepared aprepitant capsules are high in dissolution rate.